John, of Fernhill near Glasgow, has been going to Sydney’s concerts for 34 years. Karen said: “I think he’s Sydney’s biggest fan.

“We always wait outside so John can get his photo taken with him so Sydney’s met him before – but this was something else.

“No one could believe it when Sydney turned up out of the blue. He’d come all the way up from Ayr with his wife Shirley. He did a photocall with everyone who wanted their picture taken with him and he wasn’t in any rush to go away.”

John has had health problems recently and his family said Sydney’s surprise was a huge boost for him. Karen added: “He’s well loved in the community so everyone’s really happy for him.”